Roller-skate



(No Iv-Iodel.)

0,1. HIRT.

ROLLER SKATE.

Patented Nov. 8, 1885.

77v'fnesses. .2 ,Ewen/Zar.

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UNITED STATES PATENT OFFICE.

CHARLES F. HIRT, OF ERIE, PENNSYLVANIA.

ROLLER-SKATE.

SPECIFICATION forming part of Letters Patent No. 329,557, dated November 3, 1885. Application filed May 2G, 1885. Serial No. 166,775. (No model.)

To all whom t may concern:

Be it known that I, CHARLES F. HIRT, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Roller-Skates; and I do hereby declare the following to be a full7 clear, and exact description of the invention, such as will enable others skilled in the art to which it appert-ains to make and use the same.

This invention consists of certain new and useful improvements in the construction of roller-skates, as will hereinafter be fully dcscribed, and pointed out in the claims.

In an application for a patent made by me and now pending I show a construction on which the present' construction is an improvement.

My invention is illustrated in the accompanying drawings, as follows:

Figure l is a side elevation of a skate constructed with my improvements, the forward running-gear being in vertical section on a line across the axle. Fig. 2is back elevation of one of the running-gears with parts in vertical section on a line parallel with the axle. Fig. 3 is a view like Fig. 2, but shows thefootpiece deflected to one side. Figs. 4, 5, 6, and 7 show the parts B, H, F, G, and C in detail. Fig. 8 shows the part C in section on the line z z in Fig. 9. Fig. 9 shows the same part in section on the line y y in Fig. 7.

Letters of reference designate parts as follows:

A is the foot-plate. B B are the shanks or hangers, to which the running-gears are attached. B is a rod or brace connecting the two shanks or hangers. C C are the truck# frames. D D are the wheels. D' D are the axles. E is the pintle by which trucks are pivoted to the shanks. F are vertically-movable spring seats or followers fitting sockets in the shanks B. G are springs located in the sockets B. H are adjustable spring-seats, which screw into the upper ends of the sockets.

The letters indicating other parts will be referred to in place in the following general description.

The shanks or hangers B are provided with a central bore, which extends through them. At the upper end a screw-plug, H,which forms the upper seat of the contained spring, screws into the said bore, the foot-plate A being provided with an opening to afford access to this screw-plug. The lower ends of the hangers have ears b b at front and rear, through which are pintle-holes to receive the pintle E. A sliding plug or follower, F, ts in the lower end of the bore or socket of the hanger. It has a plain flat outer end, and its inner end is recessed to receive and form a seat for the spring.

The truck-frame C is provided with a transverse hole, D2, for receiving the axle D', which is of such a size as to fit so it may turn therein. It also has a longitudinal hole,E,to receive the pintle E. This is above and at right angles to the axle-hole D2. In the central partof the truck-frame there is on the upper side t hereof a plain dat bearingsurface, C, which sets up into the socket of the hanger a short distance. In front and back of this bearing are notches c c, which receive the ears b b of the shank. The truck-frames, when in position, set at an incline, as seen in Fig. l, and the notch 0,whicl1 comes on the upper side as thus inclined, is housed in on the sides, so as to form a cup, c', (see Figs. l, 7, 8, and 9,) from which an opening, c2, leads to the axlehole D. This cup is to receive the oil which is to lubricate the wheels and axle. Cotton waste or other absorbent may be put into this cup, if desired; but as it is small and really holds very little oil it is not necessary to use an absorbent. The cup really affords a very simple means for applying oil evenly to the parts requiring lubrication. The plain dat bottom of the follower F sets squarely on the plain flat surface of the bearing C on the truck-frame when the shanks B are at right angles to the axles, as seen in Fig. 2. Any deflection of the Shanks to one side, as seen in Fig. 3, will cause a vertical movement of the follower F within the socket. Such a movement is resisted by the spring G, and as soon as the deflecting force is removed the spring Gwill react the parts into the position shown in Fig. 2. The tension of the spring G is regulated by the screw-plug H. The spring G is always compressed when the foot-plate or Shanks are deiieeted in the line of its axis, and hence it is never bent or curved or twisted or depressed more on one side than )n the other. When the defleeting force is rex moved, the Shanks vare always brought Ainto -a rectverticalpositiomwhioh 'is very desiable.

What I claim as new :is- 1. In a roller-Skate, the combination, subf 'stantially as seb forth, of the truck-frame C,

having axle-hole D, pinble-holeAEfnotehes-ca, andthe flat centrally-located 'bearing-face C', with the hangers B, having the ears bib, and the vertical bore containing the follower F, seating on the bearing-face C', the spring G, and adjusting-nut H. 

